import React, { Component } from 'react'
import store from '../../redux/store'
import { createIncrementAction,createDecrementAction,createIncrementAsyncAction } from '../../redux/count_action'

export default class Count extends Component {
    
    increment=()=>{
        const {value} = this.selectNumber
        store.dispatch(createIncrementAction(value*1))
    }
    decrement=()=>{
        const {value} = this.selectNumber
        store.dispatch(createDecrementAction(value*1))
    }
    incrementIfOdd=()=>{
        const {value} = this.selectNumber
        if(store.getState()%2!==0)
          store.dispatch(createIncrementAction(value*1))
    }
    incrementAsync=()=>{
        const {value} = this.selectNumber
        store.dispatch(createIncrementAsyncAction(value*1,500))
    }
  render() {
    return (
      <div>
        <h1>当前求和为：{store.getState()}</h1>
        <select ref={c=>this.selectNumber=c}>
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
        </select>&nbsp;
        <button onClick={this.increment}>+</button>&nbsp;
        <button onClick={this.decrement}>-</button>&nbsp;
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
        <button onClick={this.incrementAsync}>异步加</button>&nbsp;
      </div>
    )
  }
}
